414 JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, Vol. XV. 



to Elliot's dolphin, S. pemiger (or gadamu), the number of teeth (||) 

 serves at once to distinguish it broadly from the present form ; and I 

 am by no means sure (since the pterygoids are close together in the 

 middle line) that it should not be transferred to Steno, in which case the 

 dental formulae of the two genera would be still more distinct than in the 

 above table. The skeleton would decide the question. 



From the Chinese white dolphin (S. sinensis) the Trevandrum form 

 is distinguished not only by colour but by the number of the teeth and 

 vertebras. 



On the whole, I am inclined to regard the Trevandrum dolphin as 

 new, and I therefore propose to call it Sotalia fergusoni. Its special 

 characters are the number of the teeth and vertebra, the marked con- 

 striction of the body in front of the caudal ridges, and the generally 

 uniform colouration, with the under-parts lighter than those above. 



Specific names and characters are, however, of minor import. The 

 real interest of the specimen consists in the information it affords as to 

 vertebral formula of the Indian Sotalice. 



'■■I. &t" ' '■ w '"---vM •■■■■-' 



